Gas flow indicator device



FIG. 1 is a front, top perspective view of a gas flow indicator device showing our new design, with the indicator concealed;

FIG. 2 is a rear, bottom perspective view thereof, with the indicator concealed;

FIG. 3 is a front, top perspective view thereof, with the indicator exposed;

FIG. 4 is a front elevational view thereof, with the indicator concealed;

FIG. 5 is a front elevational view thereof, with the indicator exposed;

FIG. 6 is a rear elevational view thereof, with the indicator concealed;

FIG. 7 is a left side view thereof, with the indicator concealed;

FIG. 8 is a right side view thereof, with the indicator concealed;

FIG. 9 is a top plan view thereof; and,

FIG. 10 is a bottom plan view thereof.

The broken lines illustrate portions of the gas flow indicator device which form no part of the claimed design. 

CLAIM The ornamental design for a gas flow indicator device, as shown and described. 